The syllabus of a science subject at the A-Levels has been designed to build on and extend the content coverage at O-Level. Students are expected to have knowledge and understanding of the subject at O-Level, either as a single subject or as part of a balanced science course. Assumed knowledge from the corresponding Science subject at O-Level will not be taught but is needed in the course of learning the A-Level Science syllabus. Students without the assumed knowledge will be required to bridge the knowledge gap during the course of study on their own.